choose your own rewind length adventure for ios

so,

we have the 30 second rewind button in ios flavor of plex.

but hulu+netflix have 10 seconds.

my audiobooks within the “music” app have 15 seconds
(15 seconds forward).

my eyetv defaults to 7.

7 seems kinda oddball to me,
but, why not have the option
to pick our own rewind length?

2021 clean-up: duplicate